Tube connector



FIG. 1 is a left side and to perspective view of my new tube connector;

FIG. 2 is a right side elevation;

FIG. 3 is a front end elevation;

FIG. 4 is a rear end elevation;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a tube connector, as shown and described. 